carousel.js

'use strict';

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

/**
 * --------------------------------------------------------------------------
 * Bootstrap (v4.0.0): carousel.js
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * --------------------------------------------------------------------------
 */

var Carousel = (function ($) {

  /**
   * ------------------------------------------------------------------------
   * Constants
   * ------------------------------------------------------------------------
   */

  var NAME = 'carousel';
  var VERSION = '4.0.0';
  var DATA_KEY = 'bs.carousel';
  var EVENT_KEY = '.' + DATA_KEY;
  var DATA_API_KEY = '.data-api';
  var JQUERY_NO_CONFLICT = $.fn[NAME];
  var TRANSITION_DURATION = 600;

  var Default = {
    interval: 5000,
    keyboard: true,
    slide: false,
    pause: 'hover',
    wrap: true
  };

  var DefaultType = {
    interval: '(number|boolean)',
    keyboard: 'boolean',
    slide: '(boolean|string)',
    pause: '(string|boolean)',
    wrap: 'boolean'
  };

  var Direction = {
    NEXT: 'next',
    PREVIOUS: 'prev'
  };

  var Event = {
    SLIDE: 'slide' + EVENT_KEY,
    SLID: 'slid' + EVENT_KEY,
    KEYDOWN: 'keydown' + EVENT_KEY,
    MOUSEENTER: 'mouseenter' + EVENT_KEY,
    MOUSELEAVE: 'mouseleave' + EVENT_KEY,
    LOAD_DATA_API: 'load' + EVENT_KEY + DATA_API_KEY,
    CLICK_DATA_API: 'click' + EVENT_KEY + DATA_API_KEY
  };

  var ClassName = {
    CAROUSEL: 'carousel',
    ACTIVE: 'active',
    SLIDE: 'slide',
    RIGHT: 'right',
    LEFT: 'left',
    ITEM: 'carousel-item'
  };

  var Selector = {
    ACTIVE: '.active',
    ACTIVE_ITEM: '.active.carousel-item',
    ITEM: '.carousel-item',
    NEXT_PREV: '.next, .prev',
    INDICATORS: '.carousel-indicators',
    DATA_SLIDE: '[data-slide], [data-slide-to]',
    DATA_RIDE: '[data-ride="carousel"]'
  };

  /**
   * ------------------------------------------------------------------------
   * Class Definition
   * ------------------------------------------------------------------------
   */

  var Carousel = (function () {
    function Carousel(element, config) {
      _classCallCheck(this, Carousel);

      this._items = null;
      this._interval = null;
      this._activeElement = null;

      this._isPaused = false;
      this._isSliding = false;

      this._config = this._getConfig(config);
      this._element = $(element)[0];
      this._indicatorsElement = $(this._element).find(Selector.INDICATORS)[0];

      this._addEventListeners();
    }

    /**
     * ------------------------------------------------------------------------
     * Data Api implementation
     * ------------------------------------------------------------------------
     */

    // getters

    _createClass(Carousel, [{
      key: 'next',

      // public

      value: function next() {
        if (!this._isSliding) {
          this._slide(Direction.NEXT);
        }
      }
    }, {
      key: 'nextWhenVisible',
      value: function nextWhenVisible() {
        // Don't call next when the page isn't visible
        if (!document.hidden) {
          this.next();
        }
      }
    }, {
      key: 'prev',
      value: function prev() {
        if (!this._isSliding) {
          this._slide(Direction.PREVIOUS);
        }
      }
    }, {
      key: 'pause',
      value: function pause(event) {
        if (!event) {
          this._isPaused = true;
        }

        if ($(this._element).find(Selector.NEXT_PREV)[0] && Util.supportsTransitionEnd()) {
          Util.triggerTransitionEnd(this._element);
          this.cycle(true);
        }

        clearInterval(this._interval);
        this._interval = null;
      }
    }, {
      key: 'cycle',
      value: function cycle(event) {
        if (!event) {
          this._isPaused = false;
        }

        if (this._interval) {
          clearInterval(this._interval);
          this._interval = null;
        }

        if (this._config.interval && !this._isPaused) {
          this._interval = setInterval($.proxy(document.visibilityState ? this.nextWhenVisible : this.next, this), this._config.interval);
        }
      }
    }, {
      key: 'to',
      value: function to(index) {
        var _this = this;

        this._activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0];

        var activeIndex = this._getItemIndex(this._activeElement);

        if (index > this._items.length - 1 || index < 0) {
          return;
        }

        if (this._isSliding) {
          $(this._element).one(Event.SLID, function () {
            return _this.to(index);
          });
          return;
        }

        if (activeIndex === index) {
          this.pause();
          this.cycle();
          return;
        }

        var direction = index > activeIndex ? Direction.NEXT : Direction.PREVIOUS;

        this._slide(direction, this._items[index]);
      }
    }, {
      key: 'dispose',
      value: function dispose() {
        $(this._element).off(EVENT_KEY);
        $.removeData(this._element, DATA_KEY);

        this._items = null;
        this._config = null;
        this._element = null;
        this._interval = null;
        this._isPaused = null;
        this._isSliding = null;
        this._activeElement = null;
        this._indicatorsElement = null;
      }

      // private

    }, {
      key: '_getConfig',
      value: function _getConfig(config) {
        config = $.extend({}, Default, config);
        Util.typeCheckConfig(NAME, config, DefaultType);
        return config;
      }
    }, {
      key: '_addEventListeners',
      value: function _addEventListeners() {
        if (this._config.keyboard) {
          $(this._element).on(Event.KEYDOWN, $.proxy(this._keydown, this));
        }

        if (this._config.pause === 'hover' && !('ontouchstart' in document.documentElement)) {
          $(this._element).on(Event.MOUSEENTER, $.proxy(this.pause, this)).on(Event.MOUSELEAVE, $.proxy(this.cycle, this));
        }
      }
    }, {
      key: '_keydown',
      value: function _keydown(event) {
        event.preventDefault();

        if (/input|textarea/i.test(event.target.tagName)) {
          return;
        }

        switch (event.which) {
          case 37:
            this.prev();break;
          case 39:
            this.next();break;
          default:
            return;
        }
      }
    }, {
      key: '_getItemIndex',
      value: function _getItemIndex(element) {
        this._items = $.makeArray($(element).parent().find(Selector.ITEM));
        return this._items.indexOf(element);
      }
    }, {
      key: '_getItemByDirection',
      value: function _getItemByDirection(direction, activeElement) {
        var isNextDirection = direction === Direction.NEXT;
        var isPrevDirection = direction === Direction.PREVIOUS;
        var activeIndex = this._getItemIndex(activeElement);
        var lastItemIndex = this._items.length - 1;
        var isGoingToWrap = isPrevDirection && activeIndex === 0 || isNextDirection && activeIndex === lastItemIndex;

        if (isGoingToWrap && !this._config.wrap) {
          return activeElement;
        }

        var delta = direction === Direction.PREVIOUS ? -1 : 1;
        var itemIndex = (activeIndex + delta) % this._items.length;

        return itemIndex === -1 ? this._items[this._items.length - 1] : this._items[itemIndex];
      }
    }, {
      key: '_triggerSlideEvent',
      value: function _triggerSlideEvent(relatedTarget, directionalClassname) {
        var slideEvent = $.Event(Event.SLIDE, {
          relatedTarget: relatedTarget,
          direction: directionalClassname
        });

        $(this._element).trigger(slideEvent);

        return slideEvent;
      }
    }, {
      key: '_setActiveIndicatorElement',
      value: function _setActiveIndicatorElement(element) {
        if (this._indicatorsElement) {
          $(this._indicatorsElement).find(Selector.ACTIVE).removeClass(ClassName.ACTIVE);

          var nextIndicator = this._indicatorsElement.children[this._getItemIndex(element)];

          if (nextIndicator) {
            $(nextIndicator).addClass(ClassName.ACTIVE);
          }
        }
      }
    }, {
      key: '_slide',
      value: function _slide(direction, element) {
        var _this2 = this;

        var activeElement = $(this._element).find(Selector.ACTIVE_ITEM)[0];
        var nextElement = element || activeElement && this._getItemByDirection(direction, activeElement);

        var isCycling = Boolean(this._interval);

        var directionalClassName = direction === Direction.NEXT ? ClassName.LEFT : ClassName.RIGHT;

        if (nextElement && $(nextElement).hasClass(ClassName.ACTIVE)) {
          this._isSliding = false;
          return;
        }

        var slideEvent = this._triggerSlideEvent(nextElement, directionalClassName);
        if (slideEvent.isDefaultPrevented()) {
          return;
        }

        if (!activeElement || !nextElement) {
          // some weirdness is happening, so we bail
          return;
        }

        this._isSliding = true;

        if (isCycling) {
          this.pause();
        }

        this._setActiveIndicatorElement(nextElement);

        var slidEvent = $.Event(Event.SLID, {
          relatedTarget: nextElement,
          direction: directionalClassName
        });

        if (Util.supportsTransitionEnd() && $(this._element).hasClass(ClassName.SLIDE)) {

          $(nextElement).addClass(direction);

          Util.reflow(nextElement);

          $(activeElement).addClass(directionalClassName);
          $(nextElement).addClass(directionalClassName);

          $(activeElement).one(Util.TRANSITION_END, function () {
            $(nextElement).removeClass(directionalClassName).removeClass(direction);

            $(nextElement).addClass(ClassName.ACTIVE);

            $(activeElement).removeClass(ClassName.ACTIVE).removeClass(direction).removeClass(directionalClassName);

            _this2._isSliding = false;

            setTimeout(function () {
              return $(_this2._element).trigger(slidEvent);
            }, 0);
          }).emulateTransitionEnd(TRANSITION_DURATION);
        } else {
          $(activeElement).removeClass(ClassName.ACTIVE);
          $(nextElement).addClass(ClassName.ACTIVE);

          this._isSliding = false;
          $(this._element).trigger(slidEvent);
        }

        if (isCycling) {
          this.cycle();
        }
      }

      // static

    }], [{
      key: '_jQueryInterface',
      value: function _jQueryInterface(config) {
        return this.each(function () {
          var data = $(this).data(DATA_KEY);
          var _config = $.extend({}, Default, $(this).data());

          if (typeof config === 'object') {
            $.extend(_config, config);
          }

          var action = typeof config === 'string' ? config : _config.slide;

          if (!data) {
            data = new Carousel(this, _config);
            $(this).data(DATA_KEY, data);
          }

          if (typeof config === 'number') {
            data.to(config);
          } else if (typeof action === 'string') {
            if (data[action] === undefined) {
              throw new Error('No method named "' + action + '"');
            }
            data[action]();
          } else if (_config.interval) {
            data.pause();
            data.cycle();
          }
        });
      }
    }, {
      key: '_dataApiClickHandler',
      value: function _dataApiClickHandler(event) {
        var selector = Util.getSelectorFromElement(this);

        if (!selector) {
          return;
        }

        var target = $(selector)[0];

        if (!target || !$(target).hasClass(ClassName.CAROUSEL)) {
          return;
        }

        var config = $.extend({}, $(target).data(), $(this).data());
        var slideIndex = this.getAttribute('data-slide-to');

        if (slideIndex) {
          config.interval = false;
        }

        Carousel._jQueryInterface.call($(target), config);

        if (slideIndex) {
          $(target).data(DATA_KEY).to(slideIndex);
        }

        event.preventDefault();
      }
    }, {
      key: 'VERSION',
      get: function get() {
        return VERSION;
      }
    }, {
      key: 'Default',
      get: function get() {
        return Default;
      }
    }]);

    return Carousel;
  })();

  $(document).on(Event.CLICK_DATA_API, Selector.DATA_SLIDE, Carousel._dataApiClickHandler);

  $(window).on(Event.LOAD_DATA_API, function () {
    $(Selector.DATA_RIDE).each(function () {
      var $carousel = $(this);
      Carousel._jQueryInterface.call($carousel, $carousel.data());
    });
  });

  /**
   * ------------------------------------------------------------------------
   * jQuery
   * ------------------------------------------------------------------------
   */

  $.fn[NAME] = Carousel._jQueryInterface;
  $.fn[NAME].Constructor = Carousel;
  $.fn[NAME].noConflict = function () {
    $.fn[NAME] = JQUERY_NO_CONFLICT;
    return Carousel._jQueryInterface;
  };

  return Carousel;
})(jQuery);
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